CN114716885A - Graphene composite coating, preparation method and heat dissipation device - Google Patents
Graphene composite coating, preparation method and heat dissipation device Download PDFInfo
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- CN114716885A CN114716885A CN202110005339.0A CN202110005339A CN114716885A CN 114716885 A CN114716885 A CN 114716885A CN 202110005339 A CN202110005339 A CN 202110005339A CN 114716885 A CN114716885 A CN 114716885A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 92
- 238000000576 coating method Methods 0.000 title claims abstract description 80
- 239000011248 coating agent Substances 0.000 title claims abstract description 75
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 50
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 40
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 40
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 36
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229920001197 polyacetylene Polymers 0.000 claims abstract description 34
- 239000002121 nanofiber Substances 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 12
- 239000002105 nanoparticle Substances 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims description 27
- 239000002994 raw material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 15
- 238000002791 soaking Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 26
- 238000003756 stirring Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 14
- 238000000498 ball milling Methods 0.000 description 13
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 239000000178 monomer Substances 0.000 description 9
- 238000001132 ultrasonic dispersion Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000013530 defoamer Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- -1 polyoxyethylene octyl phenol Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 241000446313 Lamella Species 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
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- 239000003921 oil Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LCPUCXXYIYXLJY-UHFFFAOYSA-N 1,1,2,4,4,4-hexafluorobutyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)CC(F)(F)F LCPUCXXYIYXLJY-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000007539 photo-oxidation reaction Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- YGZSVWMBUCGDCV-UHFFFAOYSA-N chloro(methyl)silane Chemical group C[SiH2]Cl YGZSVWMBUCGDCV-UHFFFAOYSA-N 0.000 description 1
- GTPDFCLBTFKHNH-UHFFFAOYSA-N chloro(phenyl)silicon Chemical compound Cl[Si]C1=CC=CC=C1 GTPDFCLBTFKHNH-UHFFFAOYSA-N 0.000 description 1
- NELRINSZCVVEAD-UHFFFAOYSA-N chloro-ethenyl-methylsilane Chemical compound C[SiH](Cl)C=C NELRINSZCVVEAD-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N ethyl butylhexanol Natural products CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- XQSBLCWFZRTIEO-UHFFFAOYSA-N hexadecan-1-amine;hydrobromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[NH3+] XQSBLCWFZRTIEO-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- WSDQIHATCCOMLH-UHFFFAOYSA-N phenyl n-(3,5-dichlorophenyl)carbamate Chemical group ClC1=CC(Cl)=CC(NC(=O)OC=2C=CC=CC=2)=C1 WSDQIHATCCOMLH-UHFFFAOYSA-N 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- ZOYFEXPFPVDYIS-UHFFFAOYSA-N trichloro(ethyl)silane Chemical compound CC[Si](Cl)(Cl)Cl ZOYFEXPFPVDYIS-UHFFFAOYSA-N 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D133/16—Homopolymers or copolymers of esters containing halogen atoms
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D149/00—Coating compositions based on homopolymers or copolymers of compounds having one or more carbon-to-carbon triple bonds; Coating compositions based on derivatives of such polymers
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/011—Nanostructured additives
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention provides a graphene composite coating, a preparation method and a heat dissipation device, wherein the graphene composite coating comprises the following components in parts by weight: 20-40 parts of graphene; 10-20 parts of a nano polymer; 3-20 parts of nano filler; 5-10 parts of nano aluminum oxide; 10-20 parts of organic fluorine-silicon modified acrylic resin; 5-20 parts of a solvent; 10-20 parts of a dispersing agent; 2-6 parts of a defoaming agent; 3-5 parts of a film-forming assistant; 3-5 parts of an anti-settling agent; wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles. In the coating, gaps among the graphene, the nano polymer, the nano filler and the nano aluminum oxide are small, the graphene, the nano polymer, the nano filler and the nano aluminum oxide are uniformly dispersed, the soaking effect is good, the mechanical property is strong, the heat transfer is easy, the weather resistance is good, the coating can be applied to a heat dissipation device of a base station, and the coating is coated on the surface of a shell of the heat dissipation device of the base station, so that the heat dissipation effect is improved.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a graphene composite coating, a preparation method and a heat dissipation device.
Background
With the rapid development of electronic devices towards the direction of high power and small volume, the heat generation amount per unit volume is increased rapidly, and when the heat cannot be effectively conducted to the outside, the temperature of the core part of the electronic device can be rapidly increased, so that the performance of the electronic device is reduced, and the service life of the electronic device is obviously shortened. The heat dissipation material on the existing electronic device has the disadvantages of low heat conductivity coefficient, poor heat dissipation and soaking effects, poor mechanical properties, poor weather resistance and easy damage under long-time high temperature.
Disclosure of Invention
In view of the above, the invention provides a graphene composite coating, a preparation method thereof and a heat dissipation device, which are used for solving the problems of poor heat dissipation and soaking effects and poor weather resistance of the existing heat dissipation material.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a graphene composite coating, which includes, by weight:
20-40 parts of graphene;
10-20 parts of a nano polymer;
3-20 parts of a nano filler;
5-10 parts of nano aluminum oxide;
10-20 parts of organic fluorine-silicon modified acrylic resin;
5-20 parts of a solvent;
10-20 parts of a dispersing agent;
2-6 parts of a defoaming agent;
3-5 parts of a film-forming assistant;
3-5 parts of an anti-settling agent;
wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles.
Wherein the thickness of the graphene is 1-5 nm.
Wherein the nano filler comprises at least one of water-soluble carbon black, nano titanium dioxide and nano zinc oxide.
Wherein the nano filler is water-soluble carbon black, and the particle size of the water-soluble carbon black is 25-30 nm.
Wherein the pipe diameter of the polyacetylene nano-fiber is 150-200nm, and the length is 10-30 μm; and/or
The grain diameter of the nano alumina is 20-30 nm.
In a second aspect, an embodiment of the present invention provides a preparation method of a graphene composite coating, including:
providing raw materials, wherein the raw materials comprise the following components in parts by weight:
20-40 parts of graphene;
10-20 parts of a nano polymer;
3-20 parts of nano filler;
5-10 parts of nano aluminum oxide;
10-20 parts of organic fluorine-silicon modified acrylic resin;
5-20 parts of a solvent;
10-20 parts of a dispersing agent;
2-6 parts of a defoaming agent;
3-5 parts of a film-forming assistant;
3-5 parts of an anti-settling agent;
wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles;
and mixing the raw materials to obtain the graphene composite coating.
Wherein the thickness of the graphene is 1-5 nm.
Wherein the nano filler comprises at least one of water-soluble carbon black, nano titanium dioxide and nano zinc oxide.
Wherein the nano filler is water-soluble carbon black, and the particle size of the water-soluble carbon black is 25-30 nm.
Wherein the pipe diameter of the polyacetylene nano-fiber is 150-200nm, and the length is 10-30 μm; and/or
The grain diameter of the nano alumina is 20-30 nm.
In a third aspect, an embodiment of the present invention provides a heat dissipation apparatus, including:
the surface of the heat dissipation shell is at least partially coated with the graphene composite coating in the embodiment.
The graphene composite coating according to the embodiment of the invention comprises the following components in parts by weight: 20-40 parts of graphene; 10-20 parts of a nano polymer; 3-20 parts of nano filler; 5-10 parts of nano aluminum oxide; 10-20 parts of organic fluorine-silicon modified acrylic resin; 5-20 parts of a solvent; 10-20 parts of a dispersing agent; 2-6 parts of a defoaming agent; 3-5 parts of a film-forming assistant; 3-5 parts of an anti-settling agent; wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles. In the coating, the graphene has high heat conductivity coefficient, gaps among the graphene, the nano polymer, the nano filler and the nano aluminum oxide are small, the graphene, the nano polymer, the nano filler and the nano aluminum oxide are uniformly dispersed, the soaking effect is good, the mechanical property is strong, heat transfer is easy, a three-dimensional heat conduction channel can be effectively established, the temperature of a heat source can be more quickly transferred to the superficial surface and the surface of a coating, the heat conduction and heat dissipation efficiency is improved, the coating has stable chemical property, good weather resistance and corrosion resistance, can be applied to a heat dissipation device of a base station, and can be coated on the surface of a shell of the heat dissipation device of the base station, so that the heat dissipation effect is favorably improved, the temperature of electronic devices in the base station is prevented from being quickly raised, and the service performance of the devices is ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
The graphene composite coating according to an embodiment of the present invention is described in detail below.
The graphene composite coating according to the embodiment of the invention comprises the following components in parts by weight: 20-40 parts of graphene; 10-20 parts of a nano polymer; 3-20 parts of a nano filler; 5-10 parts of nano aluminum oxide; 10-20 parts of organic fluorine-silicon modified acrylic resin; 5-20 parts of a solvent; 10-20 parts of a dispersing agent; 2-6 parts of a defoaming agent; 3-5 parts of a film-forming assistant; 3-5 parts of an anti-settling agent; the nano polymer comprises at least one of polyacetylene nano fiber and polypyrrole nano particle, for example, the nano polymer is polyacetylene nano fiber or polypyrrole nano particle.
The graphene can be ultrathin graphene prepared by a liquid phase stripping method or a supercritical stripping method, the internal crystal structure of the ultrathin few-layer graphene is complete, the lamella is uniform and good in continuity, the defects are few, and the heat conductivity coefficient is high; the organic fluorine-silicon modified acrylic resin can be prepared by a monomer dropwise polymerization method, and has more stable chemical properties and more excellent performances such as oxidation resistance, weather resistance, corrosion resistance and the like; the polyacetylene nano-fiber can be conductive polyacetylene nano-fiber, the conductive polyacetylene nano-fiber can be prepared by doping polyacetylene with iodine or bromine through an electrostatic spinning method, and the specific pipe diameter and length can be selected according to requirements, for example, the pipe diameter is 150-200nm, and the length is 10-30 μm; the carbon nano material is an ultra-fine and nano material, and can increase the radiation depth of the radiator and greatly improve the heat conduction and radiation efficiency; the dispersing agent is beneficial to uniformly dispersing the coating and reducing agglomeration; the defoaming agent can reduce bubbles in the dispersing process and prevent the coating from having bubbles; the film forming auxiliary agent is beneficial to coating of the coating and is convenient for film forming; the anti-settling agent is beneficial to the uniform dispersion of the coating.
In the coating, the graphene has high heat conductivity coefficient, gaps among the graphene, the nano polymer, the nano filler and the nano aluminum oxide are small, the graphene, the nano polymer, the nano filler and the nano aluminum oxide are uniformly dispersed, the soaking effect is good, the mechanical property is strong, heat transfer is easy, a three-dimensional heat conduction channel can be effectively established, the temperature of a heat source can be more quickly transferred to the superficial surface and the surface of a coating, the heat conduction and heat dissipation efficiency is improved, the coating has stable chemical property, good weather resistance and corrosion resistance, can be applied to a heat dissipation device of a base station, and can be coated on the surface of a shell of the heat dissipation device of the base station, so that the heat dissipation effect is favorably improved, the temperature of electronic devices in the base station is prevented from being quickly raised, and the service performance of the devices is ensured.
In some embodiments, the graphene may be ultra-thin graphene, the thickness of the graphene is 1-5nm, the internal crystal structure is complete, the lamella is uniform and has good continuity, the thermal conductivity is high, and the heat dissipation effect is good.
In other embodiments, the nano-filler includes at least one of water-soluble carbon black, nano-titanium dioxide, and nano-zinc oxide, for example, the nano-filler is water-soluble carbon black or nano-titanium dioxide, and the nano-titanium dioxide may be rutile type nano-titanium dioxide. The water-soluble carbon has good intermiscibility, strong wettability and excellent dispersibility, and can further improve the performance of the graphene composite coating; in addition, the water-soluble carbon black or the nano titanium dioxide can inhibit or slow down the photooxidation process, so that light cannot be directly radiated into the polymer, and the interior of the polymer is not damaged by ultraviolet rays, thereby effectively inhibiting photooxidation degradation, playing a role in protecting high molecules and improving the weather resistance of the coating.
Optionally, the nano filler is water-soluble carbon black, the particle size of the water-soluble carbon black is 25-30nm, and the specific particle size can be reasonably selected according to needs.
In some embodiments, the diameter of the polyacetylene nano-fiber is 150-200nm, and the length is 10-30 μm; and/or the particle size of the nano-alumina is 20-30 nm. The pipe diameter and the length of the polyacetylene nanofiber and the particle size of the nano-alumina can be reasonably selected according to actual needs, so that the dispersibility of the coating is better, the particle sizes of various components are better matched, gaps among particles are reduced, and the heat transfer efficiency is improved.
The embodiment of the invention provides a preparation method of a graphene composite coating, which comprises the following steps:
providing raw materials, wherein the raw materials comprise the following components in parts by weight:
20-40 parts of graphene; 10-20 parts of a nano polymer; 3-20 parts of nano filler; 5-10 parts of nano aluminum oxide; 10-20 parts of organic fluorine-silicon modified acrylic resin; 5-20 parts of a solvent; 10-20 parts of a dispersing agent; 2-6 parts of a defoaming agent; 3-5 parts of a film-forming assistant; 3-5 parts of an anti-settling agent; wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles;
and mixing the raw materials to obtain the graphene composite coating. The specific mixing mode of the raw materials can be reasonably selected according to actual conditions.
The preparation method of the organic fluorine-silicon modified acrylic resin comprises the following steps:
a. dissolving polyoxyethylene octyl phenol ether-10 (op-10), Sodium Dodecyl Sulfate (SDS) and sodium bicarbonate (NaHCO3) in water to form an emulsion;
b. then transferring the emulsion to a four-neck flask provided with a stirring device, a condenser pipe and a nitrogen inlet pipe, adding a mixed solution of half of acrylate and an organosilicon monomer (for example, the organosilicon monomer can be methyl chlorosilane, phenyl chlorosilane, methyl vinyl chlorosilane and ethyl trichlorosilane), introducing nitrogen, heating an oil bath kettle to 85 ℃, adding half of Ammonium Persulfate (APS) aqueous solution after the temperature reaches a constant value, and polymerizing to obtain a seed emulsion;
c. synchronously dropwise adding the residual monomer mixed solution and APS aqueous solution by using a dropping funnel, and then continuously dropwise adding hexafluorobutyl methacrylate (HFMA) monomer for about 0.5-1 h;
d. and (3) preserving the heat for 5h after dripping, cooling to room temperature, adjusting the pH value to be neutral by using sodium bicarbonate, and sieving by using a 100-mesh sieve to obtain the organic fluorine-silicon modified acrylic resin.
In the process of preparing the coating, specific steps may include:
dissolving the organic fluorine-silicon modified acrylic resin in a solvent (such as ethanol), and stirring at a high speed by a stirrer; after the organic fluorine-silicon modified acrylic resin is completely dissolved, adding graphene, nano polymer, nano filler, nano alumina, a dispersing agent, a defoaming agent, a film forming aid and an anti-settling agent into a stirrer, and ultrasonically dispersing for 60min while stirring at a high speed; then, putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed at 100rpm, and timing for 3 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite coating.
The graphene can be ultrathin graphene, the crystal structure in the ultrathin few-layer graphene is complete, the lamella is uniform and good in continuity, and the heat conductivity coefficient is high; the organic fluorine-silicon modified acrylic resin can be prepared by a monomer dropwise polymerization method; the polyacetylene nano-fiber can be conductive polyacetylene nano-fiber, the conductive polyacetylene nano-fiber can be prepared by doping polyacetylene with iodine or bromine through an electrostatic spinning method, and the specific pipe diameter and length can be selected according to requirements, for example, the pipe diameter is 150-200nm, and the length is 10-30 μm; the dispersing agent is beneficial to uniformly dispersing the coating and reducing agglomeration; the defoaming agent can reduce bubbles in the dispersing process and prevent the coating from having bubbles; the film forming auxiliary agent is beneficial to coating of the coating and is convenient for film forming; the anti-settling agent is beneficial to the uniform dispersion of the coating. In the coating, the graphene has high heat conductivity coefficient, gaps among the graphene, the nano polymer, the nano filler and the nano aluminum oxide are small, the graphene, the nano polymer, the nano filler and the nano aluminum oxide are uniformly dispersed, the soaking effect is good, the mechanical property is strong, heat transfer is easy, the heat conduction and heat dissipation efficiency is improved, and the coating has stable chemical property and good weather resistance.
Wherein the thickness of the graphene may be 1-5 nm.
Optionally, the nanofiller includes at least one of water-soluble carbon black, nano titanium dioxide, nano zinc oxide.
Optionally, the nanofiller is water-soluble carbon black having a particle size of 25-30 nm.
In some embodiments, the diameter of the polyacetylene nano-fiber is 150-200nm, and the length is 10-30 μm; and/or the particle size of the nano alumina is 20-30 nm.
An embodiment of the present invention provides a heat dissipation apparatus, including:
the graphene composite coating in the embodiment is coated on at least part of the surface of the heat dissipation shell, and the graphene composite coating in the embodiment is coated on the surface of the heat dissipation shell, so that the heat dissipation effect can be improved, the overhigh temperature of an electronic device or equipment in the heat dissipation shell is avoided, and the performance of the electronic device or equipment in the heat dissipation shell is ensured. The heat sink can be applied in the field of heat dissipation of base stations, such as 5G base stations.
The invention is further illustrated by the following specific examples.
Example 1
(1) Preparing organic fluorine-silicon modified acrylic resin:
the preparation of the organofluorosilicone modified acrylic resin may include:
a. dissolving polyoxyethylene octyl phenol ether-10 (op-10), Sodium Dodecyl Sulfate (SDS) and sodium bicarbonate (NaHCO3) in water to form an emulsion;
b. then transferring the emulsion to a four-neck flask provided with a stirring device, a condenser pipe and a nitrogen inlet pipe, adding half of mixed solution of acrylic ester and an organic silicon monomer, introducing nitrogen, heating an oil bath kettle to 85 ℃, adding half of Ammonium Persulfate (APS) aqueous solution after the temperature reaches a constant value, and polymerizing to obtain seed emulsion;
c. synchronously dropwise adding the residual monomer mixed solution and APS aqueous solution by using a dropping funnel, and then continuously dropwise adding hexafluorobutyl methacrylate (HFMA) monomer for about 0.5-1 h;
d. and (3) preserving the heat for 5h after dripping, cooling to room temperature, adjusting the pH value to be neutral by using sodium bicarbonate, and sieving by using a 100-mesh sieve to obtain the organic fluorine-silicon modified acrylic resin.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
20 parts of ultrathin few-layer graphene, 10 parts of conductive polyacetylene nano fiber, 10 parts of water-soluble carbon black, 5 parts of nano aluminum oxide, 10 parts of organic fluorine-silicon modified acrylic resin, 5 parts of solvent, 10 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of film-forming assistant and 3 parts of anti-settling agent;
dissolving 10 parts of organic fluorine-silicon modified acrylic resin in 5 parts of ethanol, and stirring at a high speed by a stirrer; after the organofluorosilicone modified acrylic resin is completely dissolved, adding 20 parts of ultrathin few-layer graphene, 10 parts of conductive polyacetylene nano-fiber, 10 parts of water-soluble carbon black, 5 parts of nano-alumina, 10 parts of polyvinyl alcohol, 2 parts of silicone defoamer BYK024, 3 parts of benzyl alcohol and 3 parts of amino acid ester copolymer into a stirrer, and ultrasonically dispersing for 60min while stirring at a high speed; then, putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed at 100rpm, and timing for 3 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite coating.
Example 2
(1) Preparing organic fluorine-silicon modified acrylic resin: the same as in example 1.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
40 parts of ultrathin few-layer graphene, 15 parts of conductive polyacetylene nano fiber, 20 parts of water-soluble carbon black, 10 parts of nano aluminum oxide, 20 parts of organic fluorine-silicon modified acrylic resin, 15 parts of solvent, 20 parts of dispersing agent, 6 parts of defoaming agent, 5 parts of film-forming assistant and 5 parts of anti-settling agent.
Dissolving 20 parts of organic fluorine-silicon modified acrylic resin in 15 parts of 2-propanol, and stirring at high speed by a stirrer; after the organic fluorine-silicon modified acrylic resin is completely dissolved, adding 40 parts of ultrathin few-layer graphene, 15 parts of conductive polyacetylene nano-fiber, 20 parts of water-soluble carbon black, 10 parts of nano-alumina, 20 parts of polyethylene glycol, 6 parts of organic silicon defoamer BYK024, 5 parts of ethylene glycol butyl ether and 5 parts of amino acid ester copolymer into a stirrer, and ultrasonically dispersing for 70min while stirring at a high speed; then the mixture obtained by ultrasonic dispersion is put into a zirconia ball milling tank and put into a planetary ball mill, the rotation speed is set to be 200rpm, and the timing is 3.5 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite coating.
Example 3
(1) Preparing organic fluorine-silicon modified acrylic resin: the same as in example 1.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
15 parts of graphene, 20 parts of polypyrrole nano particles, 20 parts of organic fluorine-silicon modified acrylic resin, 8 parts of nano aluminum oxide, 3 parts of rutile type nano titanium dioxide, 20 parts of solvent, 20 parts of dispersing agent, 5 parts of defoaming agent, 5 parts of film forming additive and 3 parts of anti-settling agent.
Dissolving 20 parts of organic fluorine-silicon modified acrylic resin in 20 parts of 1-butanol, and stirring at high speed by a stirrer; completely dissolving the organic fluorine-silicon modified acrylic resin; dissolving 20 parts of polypyrrole nano particles in deionized water, carrying out ultrasonic treatment on the obtained solution, dispersing 15 parts of graphene in the polypyrrole solution, and placing the obtained mixed solution in an ultrasonic cleaning machine for ultrasonic dispersion; adding the graphene mixed solution, 8 parts of nano-alumina, 3 parts of rutile type nano-titanium dioxide, 20 parts of sodium carboxymethylcellulose, 5 parts of TEGO Airex902W, 5 parts of propylene glycol phenyl ether and 3 parts of amino acid ester copolymer into a stirrer in sequence according to a ratio, and ultrasonically dispersing for 90min while stirring at a high speed; then, putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed to be 200rpm, and timing for 4 hours; and finally, grinding the ball-milled product for 4 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite coating.
Example 4
(1) Preparing organic fluorine-silicon modified acrylic resin: the same as in example 1.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
15 parts of ultrathin few-layer graphene, 12 parts of conductive polyacetylene nano-fiber, 15 parts of water-soluble carbon black, 8 parts of nano aluminum oxide, 15 parts of organic fluorine-silicon modified acrylic resin, 10 parts of solvent, 18 parts of dispersing agent, 4 parts of defoaming agent, 4 parts of film-forming assistant and 3 parts of anti-settling agent.
Dissolving 15 parts of organic fluorine-silicon modified acrylic resin in 10 parts of 2-propanol, and stirring at a high speed by a stirrer; after the organofluorosilicone modified acrylic resin is completely dissolved, adding 15 parts of ultrathin few-layer graphene, 12 parts of conductive polyacetylene nano-fiber, 15 parts of water-soluble carbon black, 8 parts of nano-alumina, 18 parts of polyvinylpyrrolidone, 4 parts of silicone defoamer BYK024, 4 parts of dodecanol ester and 3 parts of amino acid ester copolymer into a stirrer, and ultrasonically dispersing for 80min while stirring at a high speed; then putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed to 300rpm, and timing for 4 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite coating.
Example 5
(1) Preparing organic fluorine-silicon modified acrylic resin: the same as in example 1.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
35 parts of ultrathin few-layer graphene, 20 parts of conductive polyacetylene nano-fiber, 10 parts of water-soluble carbon black, 5 parts of nano aluminum oxide, 20 parts of organic fluorine-silicon modified acrylic resin, 15 parts of solvent, 20 parts of dispersing agent, 6 parts of defoaming agent, 3 parts of film-forming assistant and 5 parts of anti-settling agent.
Dissolving 20 parts of organic fluorine-silicon modified acrylic resin in 15 parts of 1-butanol, and stirring at high speed by a stirrer; after the organic fluorine-silicon modified acrylic resin is completely dissolved, adding 35 parts of ultrathin few-layer graphene, 20 parts of conductive polyacetylene nano-fiber, 10 parts of water-soluble carbon black, 5 parts of nano-alumina, 20 parts of sodium carboxymethyl cellulose, 6 parts of organic silicon defoamer TEGO Airex902W, 3 parts of propylene glycol phenyl ether and 5 parts of amino acid ester copolymer into a stirrer, and carrying out ultrasonic dispersion while stirring at high speed for 80 min; then, putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed to be 200rpm, and timing for 6 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite heat-dissipation coating.
Example 6
(1) Preparing organic fluorine-silicon modified acrylic resin: the same as in example 1.
(2) Preparation of graphene composite coating
Providing the following raw materials in parts by weight:
30 parts of ultrathin few-layer graphene, 10 parts of conductive polyacetylene nano-fiber, 20 parts of water-soluble carbon black, 6 parts of nano aluminum oxide, 18 parts of organic fluorine-silicon modified acrylic resin, 12 parts of solvent, 15 parts of dispersing agent, 5 parts of defoaming agent, 5 parts of film-forming assistant and 4 parts of anti-settling agent.
Dissolving 18 parts of organic fluorine-silicon modified acrylic resin in 12 parts of ethanol, and stirring at a high speed by a stirrer; after the organic fluorine-silicon modified acrylic resin is completely dissolved, adding 30 parts of ultrathin few-layer graphene, 10 parts of conductive polyacetylene nano-fiber, 20 parts of water-soluble carbon black, 6 parts of nano-alumina, 15 parts of hexadecyl ammonium bromide, 5 parts of organic silicon defoamer TEGO Airex902W, 5 parts of propylene glycol phenyl ether and 4 parts of amino acid ester copolymer into a stirrer, and ultrasonically dispersing for 90min while stirring at high speed; then putting the mixture obtained by ultrasonic dispersion into a zirconia ball milling tank, putting the zirconia ball milling tank into a planetary ball mill, setting the rotating speed to be 300rpm, and timing for 6 hours; and finally, grinding the ball-milled product for 5 times by using a three-roll grinder to fully mix the materials to form uniform slurry, thus obtaining the graphene composite heat-dissipation coating.
Comparative example: common heat dissipation coating.
The graphene composite coatings prepared in examples 1 to 6 and the heat dissipation coating in the comparative example were subjected to physicochemical property tests.
The physical and chemical performance test method comprises the following steps:
the graphene composite coating prepared in the embodiments 1-6 and the common heat dissipation coating in the comparative example are detected for the physicochemical properties such as the emissivity, the adhesion, the hardness, the alcohol resistance, the salt spray resistance and the impact resistance, wherein the emissivity is detected according to the ASTMC1371 standard, the adhesion is detected according to GB/T9286-98 by using a Baige tester, the hardness is detected according to GB/T6739-.
TABLE 1 paint Performance test results
As can be seen from table 1, the graphene composite coatings prepared in examples 1 to 6 have high thermal emissivity, good heat dissipation effect, strong adhesion, excellent salt spray resistance, excellent impact resistance and other properties, and are significantly better than those of the comparative examples, and have better weather resistance.
The graphene composite coatings prepared in examples 1 to 6 and the common heat dissipation coating in the comparative example were subjected to a heat dissipation effect test.
The heat dispersion test method comprises the following steps:
before spraying, the surface of the 5G base station heat dissipation device shell is treated to remove oil stains and rusty spots on the surface, and then the graphene composite coating, the common heat dissipation coating a and the common heat dissipation coating B of embodiments 1 to 6 are respectively sprayed on the surfaces of 8 identical 5G base station heat dissipation device shells, wherein the specific thicknesses are shown in table 2. Preparing a same blank 5G base station heat dissipation device shell, wherein the surface is not subjected to spraying treatment; the temperature of each shell was measured using the same type of heat source and the same heat source output power, and the results are shown in table 2.
The embodiments 1 to 6 of the invention and the common heat dissipation coating are respectively sprayed on the surface of the shell of the heat dissipation device of the corresponding base station (such as a 5G base station), and the heat dissipation effect of the coating is tested by simulating a heating core by an electric heating ceramic chip on the other side.
Table 2 heat radiation performance test results
As can be seen from table 2, the temperature reduction ranges of the graphene composite coatings prepared in examples 1 to 6 all reached 12.7 ℃. Therefore, the graphene composite coating has a good heat dissipation effect and is obviously superior to a common heat dissipation coating.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. The graphene composite coating is characterized by comprising the following components in parts by weight:
20-40 parts of graphene;
10-20 parts of a nano polymer;
3-20 parts of nano filler;
5-10 parts of nano aluminum oxide;
10-20 parts of organic fluorine-silicon modified acrylic resin;
5-20 parts of a solvent;
10-20 parts of a dispersing agent;
2-6 parts of a defoaming agent;
3-5 parts of a film-forming assistant;
3-5 parts of an anti-settling agent;
wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles.
2. The graphene composite coating according to claim 1, wherein the graphene has a thickness of 1-5 nm.
3. The graphene composite coating according to claim 1, wherein the nanofiller includes at least one of water-soluble carbon black, nano titanium dioxide, and nano zinc oxide.
4. The graphene composite coating according to claim 3, wherein the nanofiller is water-soluble carbon black having a particle size of 25-30 nm.
5. The graphene composite coating as claimed in claim 1, wherein the polyacetylene nanofibers have a tube diameter of 150-200nm and a length of 10-30 μm; and/or
The grain diameter of the nano alumina is 20-30 nm.
6. A preparation method of a graphene composite coating is characterized by comprising the following steps:
providing raw materials, wherein the raw materials comprise the following components in parts by weight:
20-40 parts of graphene;
10-20 parts of a nano polymer;
3-20 parts of nano filler;
5-10 parts of nano aluminum oxide;
10-20 parts of organic fluorine-silicon modified acrylic resin;
5-20 parts of a solvent;
10-20 parts of a dispersing agent;
2-6 parts of a defoaming agent;
3-5 parts of a film-forming assistant;
3-5 parts of an anti-settling agent;
wherein the nano-polymer comprises at least one of polyacetylene nano-fibers and polypyrrole nano-particles;
and mixing the raw materials to obtain the graphene composite coating.
7. The method according to claim 6, wherein the graphene has a thickness of 1 to 5 nm.
8. The method of claim 6, wherein the nanofiller comprises at least one of water-soluble carbon black, nano titanium dioxide, and nano zinc oxide.
9. The method of claim 8, wherein the nanofiller is a water-soluble carbon black having a particle size of 25-30 nm.
10. The preparation method according to claim 6, wherein the polyacetylene nanofibers have a tube diameter of 150-200nm and a length of 10-30 μm; and/or
The grain diameter of the nano alumina is 20-30 nm.
11. A heat dissipating device, comprising:
a heat dissipation housing, a surface of which is at least partially coated with the graphene composite coating of any one of claims 1-5.
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